LED strips are a recent innovation. These strings of Light Emitting Diodes (LEDs) are being used in many ways in Maker projects. The WS2812B addressable LED strip is sold in a variety of models with different numbers of LEDs. Each LED in the strip can be addressed individually and set to a specific color.
A microcontroller such as the Arduino is required to adjust the settings. The WS2812B strip requires three connections: (1) a 5 volt power connection, (2) a ground connection, and (3) a data connection. These connections power the LED strip and allow the microcontroller to communicate with it.